/**
 *   nTorrent - A GUI client to administer a rtorrent process 
 *   over a network connection.
 *   
 *   Copyright (C) 2007  Kim Eik
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package ntorrent.io.logging;
import java.io.ByteArrayOutputStream; 
import java.io.IOException; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
 
/** 
 * An OutputStream that writes contents to a Logger upon each call to flush() 
 */ 
class LoggingOutputStream extends ByteArrayOutputStream { 
 
 private String lineSeparator; 
 
 private Logger logger; 
 private Level level; 
 
 /** 
 * Constructor 
 * @param logger Logger to write to 
 * @param level Level at which to write the log message 
 */ 
 public LoggingOutputStream(Logger logger, Level level) { 
 super(); 
 this.logger = logger; 
 this.level = level; 
 lineSeparator = System.getProperty("line.separator"); 
 } 
 
 /** 
 * upon flush() write the existing contents of the OutputStream
 * to the logger as a log record. 
 * @throws java.io.IOException in case of error 
 */ 
 public void flush() throws IOException { 
 
 String record; 
 synchronized(this) { 
 super.flush(); 
 record = this.toString(); 
 super.reset(); 
 
 if (record.length() == 0 || record.equals(lineSeparator)) { 
 // avoid empty records 
 return; 
 } 
 
 logger.logp(level, "", "", record); 
 } 
 } 
} 
